Does the endometrium have a single layer and a double layer?

Patient's question:

No

Doctor's answer:

The thickness of the endometrium varies at different stages of the menstrual cycle. It is recommended to have a vaginal ultrasound three days after the menstrual period to determine the specific thickness of the endometrium. If the endometrium is thick, it can lead to severe menstrual pain and make it difficult for the fertilized egg to implant! This means the endometrium is thicker than normal. The thickness of the endometrium cannot determine whether one can get pregnant; ovulation is the key factor. The normal thickness of the endometrium is generally between 0.2 and 1.0 centimeters.
The endometrium is the mucous membrane that covers the uterine cavity and is one of the most highly differentiated tissues in the human body. The thickness of the normal endometrium changes continuously throughout the menstrual cycle and is not constant.
The specific figures are as follows:
1. Menstrual phase: The functional layer of the endometrium is shed, leaving the basal layer.
2. Proliferative phase: From day 6 to day 14 of the menstrual cycle, the endometrium thickens to 1–3 mm.
3. Secretory phase: From day 15 to day 28 of the menstrual cycle, the endometrium thickens to 5–7 mm.
The menstrual cycle is primarily regulated by ovarian hormones. If the ovarian hormones are disrupted, it will inevitably lead to menstrual irregularities, and the endometrium will also undergo corresponding morphological changes. Changes in the endometrium caused by various reasons are mainly manifested clinically as amenorrhea and "dysfunctional uterine bleeding." Based on your situation, it is recommended that you communicate directly with your attending physician.